It’s very hard to see that a block is being edited. So if I’m editing a block, then go off and do something else in another window, and come back, it is almost impossible to tell that I’m in editing mode. Blinking cursor just doesn’t cut it.
How could that look? Many web pages temporarily highlight DOM elements that have changed, usually with a yellowish background. Logseq’s highlight could look the same but would not be temporary.